Abstract:Biomass, widely distributed in the world and carbon-neutral sources, demonstrates significant development potential for fine chemicals and renewable energy due to its cleanliness, low carbon footprint, abundance, and renewability. Lignocellulose, one of the most abundant biomass resources on Earth, can be processed to obtain a series of important biomass-based platform molecules, such as furans and aromatic substances like furfural (Fur), furfuryl alcohol (FFA), benzaldehyde (BAD), and benzyl alcohol (BAL), through a series of hydrolysis and dehydration reactions. Conventional heterogeneous catalytic oxidation or hydrogenation of biomass-based platform molecules typically requires relatively high temperatures (190-300 ℃), high-pressure oxygen/hydrogen sources, and expensive precious metal catalysts such as supported Pt, Pd, or Au, which incur potential safety risks and additional operating costs. Electrooxidation or hydrogenation at room temperature and atmospheric pressure is an emerging alternative to conventional heterogeneous catalytic pathways, with the advantage of being electrically powered by renewable water. Additionally, eco-friendly electrochemical approaches, compliant with the principles of green chemistry, offer distinct advantages in the molecular transformation of these biomass-based platforms, avoiding the use of organic solvents to reduce secondary pollution, saving high energy consumption, and usually achieving only one end of the reaction. Among these catalytic systems, hydrotalcite-based catalysts are a promising category of catalytic materials due to a plurality of active sites, large surface area, and good electrical conductivity. The unique structure of these hydrotalcite-based catalysts guarantees large exposure of active sites to the electrolyte and thus high catalytic performance. Furthermore, these catalysts can enhance electrocatalytic performance through exfoliation or regulation of the electronic structure, achieving outstanding catalytic performance. This paper presents the composition and physicochemical properties of biomass-based platform molecules. Significant research efforts have focused on the catalytic transformation of inexpensive biomass-derived feedstock into value-added products. It then reviews the mechanism of electrochemical oxidation of biomass-based molecules using hydrotalcite-based catalysts and discusses recent research progress in this area. Hydrotalcite is often compared to brucite because they both exhibit sheet-like morphologies. Both have octahedral symmetry where the metal cations are bonded to six hydroxide groups, and each hydroxide group is bonded to three metals. The relationship between the structure of hydrotalcite and its catalytic performance is analyzed in deepth. Finally, the challenges and prospects for future research are outlined. This work provides theoretical guidance and reference significance for the study of hydrotalcite catalysts in electrochemical oxidation, facilitating the full utilization of biomass energy and contributing to "carbon peak and carbon neutrality". Close-